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Перегляд Металлофизика и новейшие технологии за темою

Перегляд Металлофизика и новейшие технологии за темою "Дефекты кристаллической решётки"

Результати 1-20 з 119

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Analytically Solvable Differential Diffusion Equations Describing the Intermediate Phase Growth

Yarmolenko, M.V. (Металлофизика и новейшие технологии, 2018)

Analytical method to solve differential diffusion equations describing the growth of the phase wedge during the intermetallic-compound formation with a narrow concentration range of homogeneity in bicrystals is proposed. ...
An Atomic Scale Study of Structural and Electronic Properties for α-Zirconium with Single Vacancies and Vacancy Clusters

Kharchenko, V.O.; Kharchenko, D.O.; Wu, X.; Wen, B.; Wu, L.; Zhang, W. (Металлофизика и новейшие технологии, 2016)

We study structural, electronic, and energy properties of pure zirconium with isolated vacancies and their clusters. We discuss the lattice constant change in pure zirconium with different concentrations of isolated vacancy ...
Assessment of the Effect of Temperature and Annealing Time on Homogenization of AlCu4MgMn Alloys

Weiss, V. (Металлофизика и новейшие технологии, 2013)

Homogenization is defined as a method of heat treatment, which consists of holding time at high temperature near the liquidus (approx. 0.7 to 0.8 of the melting temperature) to eliminate chemical inhomogeneity diffusion ...
Atomic Structure in the Vicinity of Nanovoids and Features of These Defects

Germanov, A.B.; Ershova, I.V.; Kislitskaya, E.V.; Nazarov, A.V.; Zaluzhnyi, A.G. (Металлофизика и новейшие технологии, 2013)

Many properties of metals are determined by the defects, such as point defects, their complexes and nanovoids, whereas properties of these defects are generally related to the changes in atomic structure in the vicinity ...
Carbon Distribution in Low-Temperature Isothermal Iron-Based Martensite and Its Tetragonality

Gavriljuk, V.G.; Firstov, S.O.; Sirosh, V.A.; Tyshchenko, A.I.; Mogilny, G.S. (Металлофизика и новейшие технологии, 2016)

Carbon distribution in the as-quenched Fe—C martensite obtained after cooling down to 4.5 K is studied using Mössbauer spectroscopy. The location of carbon atoms in the one of three available sublattices of octahedral ...
Carbon, Nitrogen and Hydrogen in Iron-Based Solid Solutions: Similarities and Differences in their Effect on Structure and Properties

Gavriljuk, V.G. (Металлофизика и новейшие технологии, 2016)

Interstitial N, C and H atoms in iron-based solid solutions are compared in terms of their effect on the structure and properties. Electronic structure and stacking fault energy, atomic distribution, interaction of ...
Competition of Voiding and Kirkendall Shift during Compound Growth in Reactive Diffusion–Alternative Models

Zaporozhets, T.V.; Storozhuk, N.V.; Gusak, A.M. (Металлофизика и новейшие технологии, 2016)

The simultaneous growth of both the phase-layer thickness and the void sizes during the intermetallic-compound formation with different mobilities of components and with a narrow concentration-range of homogeneity is ...
Diffusion of Nitrogen and Phase—Structural Transformations in Titanium

Tkachuk, O.; Matychak, Ya.; Pohrelyuk, I.; Fedirko, V. (Металлофизика и новейшие технологии, 2014)

The process of high-temperature nitridation (Т = 950°C) of titanium is investigated analytically and experimentally. The role of nitrogen as α-stabilizer in forming of nitride layer and diffusion zone, which contains three ...
Dynamical Theory of Triple-Crystal X-ray Diffractometry and Characterization of Microdefects and Strains in Imperfect Single Crystals

Molodkin, V.B.; Olikhovskii, S.I.; Len, E.G.; Kyslovskyy, Ye.M.; Reshetnyk, O.V.; Vladimirova, T.P.; Sheludchenko, B.V.; Skakunova, E.S.; Lizunov, V.V.; Kochelab, E.V.; Fodchuk, I.M.; Klad’ko, V.P. (Металлофизика и новейшие технологии, 2016)

A short review of basic principles and limitations in obtaining the analytical expressions for the coherent and diffuse scattering intensities measured by the triple-crystal diffractometer (TCD) are presented. Explicit ...
Effect of Oxygen Activity on the Effectiveness of Nodulization in the Spheroidal Graphite Cast Iron Production

Nová, I.; Machuta, J. (Металлофизика и новейшие технологии, 2014)

Production of castings with spheroidal graphite iron (SGI) requires the maintenance of metallurgical and technological principles. Oxygen plays an important role in this production. The influence of oxygen on cast iron has ...
Effect of Temperature on the Corrosion Behaviours of L360QCS in the Environments Containing Elemental Sulphur and H₂S/CO₂

Shuqi Zheng; Chunyu Li; Changfeng Chen (Металлофизика и новейшие технологии, 2012)

The effect of temperature on the corrosion behaviours of L360QCS in H₂S, CO₂ and elemental sulphur environments are investigated. The corrosion weight-loss rate, microscopy, chemical compositions and phase compositions of ...
Grain-Boundary Diffusion of Hydrogen Atoms in the α-Iron

Teus, S.M.; Gavriljuk, V.G. (Металлофизика и новейшие технологии, 2014)

Grain boundary diffusion of hydrogen atoms in the α-iron is analysed based on the theoretical modelling. By means of molecular-dynamics simulation of hydrogen-atoms’ migration in selected special grain boundaries with ...
Grain Boundary Diffusion with Simultaneous Chemical Interaction in Grain Boundary

Petelin, A.L.; Bokstein, B.S. (Металлофизика и новейшие технологии, 2013)

The new model is developed, taking into account the simultaneous grain boundary diffusion (within the Fisher—Gibbs approximation) and chemical interaction, which leads to the AB-type molecules’ formation in a binary system. ...
Hydrogen Grain Boundary Segregation and Migration in the Alpha-Iron

Gavriljuk, V.G.; Teus, S.M. (Металлофизика и новейшие технологии, 2017)

Based on the difference in diffusion mechanisms of substitutional and interstitial atoms and using molecular dynamics simulation of hydrogen migration, it is shown that accelerated hydrogen flux in the polycrystalline iron ...
Hydrogen-Induced Effects in Annealed and Prestrained 316L-Type Stainless Steel Studied by Mechanical Spectroscopy

Shyvaniuk, V.M. (Металлофизика и новейшие технологии, 2014)

Annealed and tensile prestrained 316L-type stainless steel is studied by internal friction (IF) method. Low-frequency forced-vibration measurements of IF are carried out in the temperature range of 130—500 K before and ...
Hydrogen Mobility and Its Interaction with Dislocations in Nickel-Based Inconel 718 Alloy

Teus, S.M. (Металлофизика и новейшие технологии, 2017)

The hydrogen effects in the nickel-based alloy Inconel 718 are studied using the mechanical spectroscopy and mechanical tests. The enthalpies of hydrogen-atoms’ migration and hydrogen–dislocations binding as well as the ...
Hydrogen Sorption Properties of Ti₀,₄₇₅Zr₀,₃Mn₀,₂₂₅ Eutectic Alloy Alloyed with 2 at.% and 5 at.% of Vanadium

Ivanchenko, V.G.; Dekhtyarenko, V.A.; Pryadko, T.V. (Металлофизика и новейшие технологии, 2015)

Sorption properties and kinetic parameters of hydrogenating and dehydrogenating processes of Ti₀,₄₇₅Zr₀,₃Mn₀,₂₂₅ eutectic alloy, in which partial substitution of each of its component with 2% and 5% of vanadium is performed, ...
Influence of Copper Pretreatment on the Phase and Pore Formations in the Solid Phase Reactions of Copper with Tin

Morozovych, V.V.; Honda, A.R.; Lyashenko, Yu.O.; Korol, Ya.D.; Liashenko, O.Yu.; Cserhát, С.; Gusak, A.M. (Металлофизика и новейшие технологии, 2018)

The solid-phase reactions of copper with tin are considered, and the porosity of the reaction products depending on the pretreatment of the copper substrate is investigated. Copper substrates for the reaction are prepared ...
Influence of Heat Treatment on Spatial Distribution of Chemical Elements in Welding Microalloyed Steels

Tkachenko, I.F.; Uniyat, M.A. (Металлофизика и новейшие технологии, 2015)

The effect of isothermal holding of various duration at subcritical temperature on the spatial distribution of main chemical elements in the finally normalized X60, E36, and ASTM A516-65 steels is studied using SEM X-ray ...
Longitudinal Ultrasound Velocity and Attenuation in Isotopically Enriched Cadmium

Bulatov, A.S.; Kovtun, G.P.; Klochko, V.S.; Korniets, A.V.; Solopikhin, D.A.; Shcherban, A.P. (Металлофизика и новейшие технологии, 2018)

The results of the acoustic-properties’ study of high-purity (>99.999%) cadmium enriched to 66.4% with the isotope ¹⁰⁶Cd and to 82.2% with the isotope ¹¹⁶Cd are presented for the temperature range of 77–300 K. Isotopic ...

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